multiple pxe servers on same network
paolo at informaticalombarda.it
Tue May 17 07:05:56 UTC 2011
I am using the ISC DHCP server as a PXE server on the network from one
year inside a computer lab.
I wish I could insert a second PXE server on the same network
(10.1.0.0/24). To these two PXE server, it connects multiple clients
every week. I can not use the trick of mac addres to assign a client to
a server rather than another.
Reading wikipedia it seems that you can send a DHCOFFER with a list of
"" If a PXE redirection service (Proxy DHCP) Receives an extended
DHCPDISCOVER, it replies by with an extended DHCPOFFER to the client to
port 68/UDP (DHCP client port).
An extended DHCPOFFER Mainly contains:
PXE Discovery Control field to recommend multicasting, broadcasting,
unicasting or to contact the PXE boot servers
a list of IP addresses available Each of PXE Boot Server Type
PXE Boot Menu With Each entry Representing a PXE Boot Server Type
PXE Boot prompt telling the user to press a key Certain to see the boot menu
a timeout to launch the first boot menu entry if it expires
The Proxy DHCP service run May Also On The Same host as the standard
DHCP service. Since two services can not share port 67/UDP, the Proxy
DHCP runs on port 4011/UDP and Expects the extended DHCPDISCOVER packets
from PXE Clients to be DHCPREQUESTs. The standard DHCP service has to
send a special combination of PXE options in ITS DHCPOFFER, I know the
PXE client knows to look for a Proxy DHCP on the Same host, port 4011/UDP. "
How can you do this
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